Bugfix: Thread old style "Content-Type=application/pgp" like plain text to handle this kind of clearsigned messaged correctly.
Bugfix: Thread old style "Content-Type=application/pgp" like plain text to handle this kind of clearsigned messaged correctly.

svn path=/trunk/kdenetwork/kmail/; revision=174225

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi